14 November 2007

New draggable maps using Ordnance Survey 1:50,000 mapping (Landranger series)What is Geograph?"The Geograph British Isles project aims to collect geographically representative photographs and information for every square kilometre of the UK and the Republic of Ireland, and you can be part of it."

Draggable Geograph Map of Great Britain (beta)

64% complete for the British Isleshttp://www.geograph.org.uk/numbers.php

How is the done?"But basically it just (JUST!?) involved cutting up 12GB of raw tiff files from theOS, into more manageable png chunks using imagemagick, and then ondemand but cached on disk it cut into png tiles. The overlay is alsogenerated in php, ondemand and cached with memcached. And of course itusing openlayers as the client library."Barry Hunter (nearby.org.uk)

Mapperz thanks Barry for sharing his time and tweaks on this. Well done and keep up the good work.